Study on the Applicability of Needle/Cone Penetration Experiment for Asphalt-Rubber

Table 2

Main technical indexes of CR.

Experiment item	Shaanxi Expressway	Hunan HeDeLi	Xian ZhongXuan
Density/ (g⋅cm^−3)	1.17	1.19	1.18
ωwater (%)	0.75	0.81	0.78
ωmetal (%)	0	0.01	0
ωfiber (%)	0.01	0	0.02
Ash (%)	6.00	5.02	7.20
Acetone extractives (%)	6.18	6.13	3.86
Carbon black (%)	28	28	29
Rubber hydrocarbon (%)	61	57	57